[PATCH] block: update blk_stack_limits documentation

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Listing every single features that needs to be pre-set by stacking
drivers does not scale.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 block/blk-settings.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/block/blk-settings.c b/block/blk-settings.c
index 95fc39d09872..5ee3d6d1448d 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -508,10 +508,10 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
 	t->features |= (b->features & BLK_FEAT_INHERIT_MASK);
 
 	/*
-	 * BLK_FEAT_NOWAIT and BLK_FEAT_POLL need to be supported both by the
-	 * stacking driver and all underlying devices.  The stacking driver sets
-	 * the flags before stacking the limits, and this will clear the flags
-	 * if any of the underlying devices does not support it.
+	 * Some feaures need to be supported both by the stacking driver and all
+	 * underlying devices.  The stacking driver sets these flags before
+	 * stacking the limits, and this will clear the flags if any of the
+	 * underlying devices does not support it.
 	 */
 	if (!(b->features & BLK_FEAT_NOWAIT))
 		t->features &= ~BLK_FEAT_NOWAIT;
-- 
2.45.2





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